Threading-machine.



P. H. McCAIN.

THREADING MACHINE. APPLICATION HLED APR. 16. 1914.

1,188,461. Patented June 27,1916.

3 SHEETS-SHEET l.

P. H. MCCAIN.

THREADING MACHINE.

APPLICATION FILED APR. 16. 1914.

1,188,461. PatenfedJune 27, 1916.

3 SHEETS-SHEET 2.

P. H. McCA|N. THREADING MACHINE.

APPLICATION FILEDQAPR. 16. I914.

1 1 88,46 1. Patented J 'un'e 27, 1916.

3 SHEETS-SHEET 3- UNITED'STATES PATENT OFFICE.

- PAUL H. MCCAIN, OF CHICAGO, ILLINOIS.

THREADING-MACHINE.

Specification of Letters Patent. P t t June 27,191

Application filed April 16, 1914. Serial No. 832,178.

The principal object of the invention is to provide a simple machine of this class which may be used for forming threads of different pitch and for accommodating members of different sizes.

For the attainment of these ends and the accomplishment of other new and useful objects, as will appear, the invention consists in the features of novelty in the construction, combination and arrangement of the several parts generally shown in the accompanying drawings and described in the specification, but more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a plan View of a machine constructed in accordance with the principles of my invention; Fig. 2 is an elevation, partly in section, on line 2-2 of Fig: 1, and Fig. 3 is a sectional view on the line 33 of Fig. 1.

This invention relates to 'a machine for forming a thread on the outside of a memher, not by cutting or actually removing any of the material from a member, but by impressing a certain portion and building up a space between, thereby forming a thread of any desired shape in which the deepest portion of the thread is less than the diameter of the member and the external diameter of the thread is somewhat greater than the diameter of the member. Of course, it-is possible to provide cutters or threading members which, instead of rolling a thread upon the member, as the present process may be briefly described, actually cuts and removes a portion of the material. however, by their rolling action on the opposite sides of the member to be threaded not only form the threads thereonbutalso positively feed the member to-be threaded in the proper direction with the proper feeding actiom The present threading members,

Referring now more particularly to the drawings, a base member 1 is formed with a slot 2 in which a pair of bearings 3 are ad ustable. One of the bearings is adjustable in the slot by means of a wedge 4 and an ad usting screw 5, and the other bearing member 1s adaptedfor more rapid adjustment by means of an eccentric shaft 6 con trolled by an arm 7 having a controlling dog 8 to engage-any one of the teeth of a segment 9 secured to the base member.

A support 10 has a-journal portion 11 fitting closely in each bearing member 3, and

- tion 15 with its axis at right angles to the axis of the bearing, and mounted for free rotation in the perforation is a sleeve 16 and a shoulder 17 at one end and adjusting device 18 for holding it in place within the perforation. Secured to each sleeve 16 by means of a plate 19 is a threading member 20, the members having alternately disposed thread-forming grooves; that is, a threadforming projection on one member is opposite a thread-forminggroove on the other member.

Secured to each bearing member 3 is a fixed bracket 21 in which a shaft 22 is sleeve member at this end is a universal con-" nection, designated generally by the reference' numeral 23-, constructed in any well known manner by means of which the'sleeve 16 may be rotated'when the shaft 22 is rotated. The internal diameter of the sleeve 16 is considerably greater than the external diameter of the shaft so that the support 10 may be rotated to a considerable degree before the end of the sleeve, .whichis not connected with the shaft, will contact therewith. Preferably the slce e is tapered from the end which is connected with the,

shaft. In order to rotate both of theish'sifts 22 a common driving shaft 24 is provided with worms 25 and each shaft 22 is provided with a gear 26 meshing with the worm for rotating the shaft.

Secured to the base member 1 at one side thereof and intermediate the bearing members 3 is a support 27 formed at its upper end with atrough or groove 28 in which a bar 29 or member to be threaded is seated for the threading action.

In operation the member to be threaded is inserted between the threading members 20, which are oppositely inclined, for the reason that they operate on opposite sides of the member to be threaded and are inclined the same amount in opposite directions from a vertical center line for the purpose of determining the inclination of the thread to be formed on the member, and the rolling action or contact of these members with the opposite sides of the member to be threaded not only forms a thread by forming a ridge of material betweentwo grooves, but also, by their rotatlon, feeds a member to be threaded forwardly in .ac-

cordance with the pitch of the thread to beformed. One of the bearingmembers 2 is fixed in position by means of the wedge adjusting device, and the other bearing member is provided with means for moving it quickly into and out of position by simply throwing the hand lever 7 so that the dog thereof contacts with any one of the teeth of the segment so that the bearing member and the threading member carried thereby are readily movable into and out of position for making threads of the same pitch from brackets if it is long enough to extend from the threading rolls to the adjacent edges of the brackets, as shown in Fig. 1.

It is obvious that others skilled in the art to which this invention appertains may make various changes in the construction, combination and arrangement of the several parts within the scope of the claims.

What I claim is:

1. A continuous threading machine comprising rotatable threading rollers With 0ppositely disposed threads, and rotatable threads adapted to contact on the opposite, -s1des of a member to .be threaded, and lo tatable means'for independently inclining the rollers to vary the angle of' inclination of the thread.

3. In a threading machine, the combina tion of a pain of threading members adapted to contact on opposite sides of the members to be threaded, means for rotating each member, a separate rota-table support for each member for adjusting. the inclination thereof, and a universal connection between the rotating means and each member whereby it may be inclined inv the support.

4. In a threading machine, the combination of oppositelydisposed threading members adjustable toward and from each other and adapted to contact on opposite sides of a member to be threaded, means for operating each threading member, and a rotatable support for each threading member by means of which the inclination can be changed independently for varying the angle of inclination of the threa 5. A threading machine comprising threaded members adjustable toward and from each other, a support for the members to be threaded whereby the threading members contact the opposite sides of the member to be threaded, means to rotate the threading members, and a rotatable support for each of the threading members whereby their inclination may be independently adjusted for varying the angle of inclination of the thread.

6. In a threading machine, the combination with oppositely disposed threading members, of a shaft for rotating each member, a universal connection. between each shaft and its member, a bearing for each member, and a support rotatable in each bearing for adjustment therein adapted to carry the member with its axis at right angles to the axis of the bearing.

7. In a threading machine, a pair of adjustable bearings movable toward and from each other, a support mounted in each bearing having a perforated portion with its axis at right angles to the axis of the bearing, a sleeve rotatable in the perforated portion, a threading member mounted upon the sleeve, a shaft extending through the sleeve with a space between it and the sleeve, and a universal connection between the shaft and the sleeve whereby the inclination bf each threading member may be changed with respect to the shaft for varying the angle of inclination of the thread made.

8. In a threading machine, a pair of sup- N ports, bearings movable toward and from each other in which the su ports are adjustably rotatable, the bearings and sup- .ports' being provided with graduations to indicate .the position of the supports in the bearings, and threading members mounted upon and movable with the supports about anaxis substantially at right angles to the axis of the bearings and having oppositely each bearing, the supports being rotatable in the bearings for varying the inclination of the threading members wherebyv threads of predetermined angle of inclination mayv be formed.

10. In a threading machine, the combination ofa pair of perforated supports ad justable toward and from each other, a threading member carried by each support, a shaft extending through the perforat1on of each support and fieely movable therein, a support for holding each shaft m fixed position, and a universal connect on between each shaft and the corresponding threadlng 'memberwhereby its perforated support may be oscillated with respect to' the shaft for varying the inclination of the threading member.

11. In a continuously operable threading machine, the combination of a pair of rotatable threading -members having thread forming grooves oppositely disposed. with respect to each other and being adjustable toward and from each other on opposite sides of the member to'be threaded, and a fixed support for seating a member to be threaded whereby itmay be fed -continuously between the threading members to thread the members from end to end.

' 12. In a threading machine, the combination ofa pair of rotatable and adjustably inclinable members, with similar threadforming grooves in the outer edge thereof adapted to engage the'opposite sides of a member to be threaded and inclined in op- '55 whereby, in rotating, the opposite sides of posite directions with respect to each other themember to be threaded will be engaged forming a thread on said member and for feeding the threaded member forwardly in accordance with the inclination of the threading members .with respect to each other whereby a member may be threaded from end to end if desired. 7 k

13. In a threading machine, the combination with a base member, of bearing mem- I bers 'slidable on said base member toward .and from each other having means for tightening the bearing, a support rotatable in each bearing adjustable with respect thereto adapted to be held in'place by said tightening means and each having a perforated portion, a sleeve mounted in said perforated portion, a fixed. shaft movable within the bearing and extending within the sleeve, thread-forming members, one on each sleeve with oppositely disposed thread-forming portions adapted to engage opposite sides of a member to be threaded-and rotatable about the axis of said bearing to vary-the angle of inclination thereof, means to secure each of said members to the corresponding Sleeve, a

universal connection between each shaft and the corresponding sleeve whereby the support can be tilted for varying the angle of inclination, means for rotating the shafts, and a support fixed to the" base member for holding a member to be threaded in position to be engaged by both of said threading members and for preventing the; member to be 7 threaded from being moved out of proper engaglng position.

14. In a threading machine-the combination with a base member, of bearings adj ustable toward and from each other on said base member, supports rotatably mounted.

in each bearing member, thread-forming rollers carried by the supports, means for rotating the rollers, and means for' separately adjusting both of said bearing members toward andfrom each other.

-15. In a threading machine, the combina- Y tion with a base member, of bearings adjust able toward and from each other on said base memoer,.supports rotatably mounted in each bearing member, thread-forming rollers carried by the supports, means for rotating the rollers, a support for a member to be threaded intermediate the bearings,

means for adjusting and fixing the position of one bearing member with respect to the support for the member to be threaded, and means for varying the position of the other bearing with respect to the support for the member to be threaded whereby this said gf her bearing may be freely moved to and bearings movable adjustably toward and from each other, a support rotatably adjustable ineach bearing, a thread-forming roller rotatable in each support, and means for rotating the said rollers comprising a shaft fixed wlth respect to each bearing and com nected to each roller, a common shaft at right angles to the other shafts, and'driving connections one between the common shaft and each of the other two shafts.

17.In a threading 'machine, a pair of bearings movable adjustably toward andfrom each other, a support mountedin each 1 6. In a threading machine, a pair of I bearing, a threading member mounted in each support, a bracket fixed to each bearing, a shaft j ournaled in each bracket, means to connect each shaft with one of" the threading members, a common shaft extending through the brackets, and a worm and gear connection between the common shaft and each of the shafts forrotating the separate threading member shafts.

18. In a threading machine, the combination of oppositely disposed threading members adjustable toward and from each other and adapted to contact on '-opp0site sides of a member to be threaded, means for operating each threading member, a rotatable sup- 1,1eaeai' port for'each threading member by means of which the inclination can be changed for varying the angle of inclination of the thread, and a scale for indicating the angu-' lar position of each su port whereby the angle of inclination of t e thread to be cut canbe predetermined.

In testimony whereof I have signed. my

name to this specification, in the presence of E. MrWHITING, MASON PHELPS. 

